-er -ol b-u bbb bbd bbe bbl bbn bbo bbr bbu bdb bdd bde bdl bdo bdr bdu be- beb bed bee bel ben beo ber beu blb bld ble bll bln blo blr blu bnb bnd bne bnl bnn bno bnr bnu bob bod boe bol bon boo bor bou brb brd bre brl brn bro brr bru bub bud bue bul bun buo bur buu dbb dbd dbe dbl dbn dbo dbr dbu ddb ddd dde ddl ddn ddo ddr ddu de- deb ded dee del den deo der deu dl- dlb dld dle dll dlo dlr dlu dnb dnd dne dnl dnn dno dnr dob dod doe dol don doo dor dou drb drd dre drl drn dro drr dru dub dud due dul dun duo dur ebb ebd ebe ebl ebn ebo ebr ebu ed- edb edd ede edl edn edo edr edu eeb eed eee eel een eeo eer elb eld ele ell eln elo elr elu en- enb end ene enl enn eno enr enu eo- eob eod eoe eol eon eoo eor eou erb erd ere erl ern ero err eru eu- eub eud eue eul eun eur lbb lbd lbe lbl lbo lbr lbu ldb ldd lde ldl ldn ldo ldr ldu leb led lee lel len leo ler leu llb lld lle lll lln llo llr llu lnb lnd lne lnl lnn lno lnr lnu lob lod loe lol lon loo lor lou lrb lrd lrn lro lrr lru lub lud lue lul lun luo lur luu nbb nbd nbe nbl nbn nbo nbr nbu ndb ndd nde ndl ndn ndo ndr ndu ne- neb ned nee nel nen neo ner neu nlb nld nle nll nln nlo nlr nlu nnb nne nnl nnn nno nnu no- nob nod noe nol non noo nor nou nrb nrd nre nrl nrn nro nrr nru nub nud nue nul nun nuo nur nuu ob- obb obd obe obl obn obo obr obu odb odd ode odl odn odo odr odu oeb oed oee oel oen oeo oer olb old ole oll oln olo olu on- onb ond one onl onn ono onr onu oo- oob ood ool oon ooo oor or- orb ord ore orl orn oro orr oru ou- oud oue oul oun ouo our rbb rbd rbe rbl rbn rbo rbr rbu rdb rdd rde rdl rdn rdo rdr rdu re- reb red ree rel ren reo rer reu rld rle rll rln rlo rlr rlu rnb rnd rnn rno rnr rnu rob rod roe rol ron roo ror rou rrb rrd rrl rrn rrr rru rub rud rue run ruo rur ruu ubb ube ubl ubn ubo ubr ubu udb udd ude udl udn udo udr udu ueb ued uee uel uen uer ulb uld ule ull uln ulo ulr ulu un- unb und une unl unn uno unr unu uob uod uoe uol uon uoo uor ur- urb urd ure url urn uro urr uru uue uun uur uuu